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Direct Nanoimprinting of a Colloidal Self‐Organizing Nanowire Ink for Flexible, Transparent Electrodes
Author(s) -
Maurer Johannes H. M.,
GonzálezGarcía Lola,
Backes Indra K.,
Reiser Beate,
Schlossberg Sarah M.,
Kraus Tobias
Publication year - 2017
Publication title -
advanced materials technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.184
H-Index - 42
ISSN - 2365-709X
DOI - 10.1002/admt.201700034
Subject(s) - materials science , nanowire , electrode , polyethylene terephthalate , bend radius , nanotechnology , pdms stamp , composite material , resistive touchscreen , electrical conductor , optoelectronics , foil method , sheet resistance , inkwell , bending , fabrication , layer (electronics) , chemistry , electrical engineering , medicine , alternative medicine , engineering , pathology
A semicontinuous process is used to nanoimprint a nanowire ink and form transparent conductive electrodes. Ultrathin gold nanowires are confined in the features of an elastomeric stamp, where they spontaneously assemble upon drying into hierarchical, percolating superstructures. This templated self‐organization yields grids with defined line widths down to 0.9 µm and high pattern fidelity. Metal grids with square, hexagonal, and linear features are printed over 30 cm 2 on different substrates and gently sintered in hydrogen plasma. Meshes on polyethylene terephthalate foil show high optical transmittances (>92%) and low sheet resistances (106–168 Ω sq −1 ). Their resistance is changed by only 10% after 500 bending cycles at a radius of 5 mm. The printed electrodes are used to build capacitive and resistive touch sensor devices.